Production flow · The flow measure · Element
The lead time
Elapsed time from release to completion, with its spread.
The part
What it is
This is what the customer experiences and what a promise is made against, so its variability matters as much as its average.
The upper percentile is the honest basis for a delivery promise, and it is rarely the number used.
The smallest level
The attributes it carries
Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.